Der Riese (German for "The Giant" pronounced Dehr Rees-uh), also known as Zombie Factory, is the fourth and final Nazi Zombies World at War map, featured in Call of Duty: World at War, and is the sequel to the previous map, Shi No Numa. It is set in a secret Nazi facility in Germany, and features the Teleporter and a Pack-a-Punch machine, which can upgrade players weapons. It was released on August 6th, 2009 as part of World at War's Map Pack 3. It was later released on the iPhone OS September 30th, 2010.

Max Ammo (An Ammunition Box) - Gives all players full ammo for all guns. This will not refill the player's current magazine. It is a good idea for every player to reload before retrieving this pickup, to get the most ammo from it, particularly with LMGs.

Nuke (A nuclear bomb) Kills all of the zombies in a vicinity. (Also gives 400 points to each player) Note that there is a delay between getting the Nuke, and the zombies dying.

Insta-Kill (A skull) - Makes all of the zombies a one hit kill with any weapon. The player will receive 110 points per kill (100 and 10, separately). Knife kills obtain 130 points.

Double Points (A "2X") - Doubles all points given to all players when damaging/killing a zombie or rebuilding a barrier. This will not double points given by Carpenter or the Nuke (excluding Black Ops maps)

Carpenter (A hammer) - Rebuilds all barricades in the map. (Also gives 200 points to each player, if any barricades were fixed)

You have to turn on the power so that the teleporters can be linked so that the Pack-a-Punch Machine can be used. It will also open the doors in the right and left factory rooms, lower the bridge connecting the right and left hallways, and power the Perk-a-Cola machines.

Linking the teleporters requires the player to approach it and hold the action button. After doing this a timer will appear, starting at 25 seconds, counting down. Within this time the player must return to the original room (spawn room) and link it to the mainframe. Only by linking all three teleporters to the mainframe can the Pack-a-Punch Machine be used. Every time a teleporter is linked, the door opens a little more. It costs 1500 to teleport, and teleporting can only be accomplished by going from one node to the mainframe, never vice versa or to another node. Sometimes, the demonic girl announcer will say "uh-oh" or "no treat for you!" and no power-up will be dropped. It is then possible for a Hellhound to appear after the teleporter is used. After heavy use of the teleporters, groups of up to eight Hellhounds can appear at once after each teleport, either along with or replacing a power-up drop. This becomes more likely as the rounds progress, and can even happen while the teleporters are being linked. If the player goes outside of the map, a large black rectangular box can be seen. If reaching the inside, the same swirl that appears when the player teleports appears. It is here that the player is sent instead of directly to the mainframe. There are four of these rooms, one for each player. If someone went inside of these boxes, and someone were to teleport, the person teleporting would see the person inside the box. It is also quite possible the player is sent here in with collision off (so the player will not fall), as the weapon is put away.

Hellhounds walk about the map, limping or in a wolf hunting fashion until they spot players, at which point they ignite and attack. The Monkey Bomb does not work on Hellhounds. After round 15, Hellhounds will spawn with the zombies. After heavy use of the teleporters, Hellhounds appear and attack. At first, one Hellhound may appear instead of a power-up. Then, clusters of up to eight Hellhounds begin to appear, and will continue to appear after every subsequent teleport. It is possible for both a power-up and a quartet of hounds to spawn after a teleport. When the dogs are walking, they are invulnerable to all weapons, excluding the Wunderwaffe, or the electro-shock barriers. Hitting a dog with anything else will cause it to start sprinting. A dog's health will not increase after round 20 or so. They will always be killed by two Bowie Knife hits (one on the first 2 waves), or a single magazine of a non upgraded Thompson. Hellhounds can be killed in a maximum chain of 4. The Hellhounds of Der Riese are somewhat easier than the Hellhounds of Shi No Numa since they start out limping so that the players can get a good shot on them before they start charging.

The Monkey Bomb is a new weapon in Der Riese. It is a Cymbal-Banging Monkey Toy that has what appears to be dynamite attached to its back. It is used by pressing the secondary grenade button. When thrown, the distraction causes the zombies to crowd around it until it explodes, very similar to the Pipe Bomb in the Left 4 Dead series.

The Pack-a-Punch Machine, which can upgrade the players weapons, is featured in the map. When upgraded, the weapons have a new platinum-esque finish with what seem to be engravings on it and are upgraded to make them more effective

The Bowie Knife is another new weapon. When bought, it takes the place of the normal knife. It is a one-hit-kill weapon, up to, approximately, Round 12, and costs 3000 points to purchase. Also, when the player bleeds out of revive time and respawns in a new round, the player will still have the bowie knife

Teleporters have been added too. In order to activate them, a player must go to one teleporter, activate it, then quickly link it to the mainframe. The players have a stopwatch at the top left corner of the screen that indicates how much time the players have left to link it to the mainframe. If the players succeed, the players can teleport from activated pads to the mainframe

The Mystery Box is once again pointed at by a trail of light from the sky. This time, however, the light is blue and comparatively harder to spot, let alone tell where the box is. Also due to the higher buildings and close box respawn areas the box may be hard to pin-point to unseasoned players. The iPod version (which does not include the "light trail" indicator) features a map at all mystery box locations that indicates the box's current location with a green light.

There is a solar eclipse occurring in the map when playing in a full-screen game mode, but when playing Split-screen two player, it's around Midnight.

Der Riese is set in a secret Nazi Factory in Germany. It has several rooms within it. The starting room is just outside the factory. There are four barricades against the Zombies. Two at either side of the mainframe, one to the side of the power generator, and one down a staircase. There are two doors that leave the starting room and lead to the right/left factory rooms.

In this room:

Pack-a-Punch Machine - 5000 points per use, locked until power is turned on and all 3 teleporters are linked.

Radio - Beside a barrel under a ledge near the entrance to the staircase barricade

There are also a lot of weird signs under the bars of the sewers (when you are standing on the mainframe with your back to the pack-a-punch machine, go down the stairs and on your left. Look down and you will see weird signs)

After opening the door on the right there is a door to the right hallway. There is a railing above in which Zombies can jump down from after the power is activated . There are also two barricades in which Zombies can break through. There is also a door that will open when the electricity is turned on, connecting this room to the Mystery Box spawning room. There is a locked door leading to the right hallway.

After opening the door on the left, there are two barricades and a door leading to the left hallway. There is also a door that will open when the electricity is turned on, connecting this room to the mystery box spawning room.

After opening the door in the left factory room, the player will come to this hallway. It contains the trench gun and three barricades. There is a staircase leading to a box barricade and another locked door leading to Teleporter A.

In the Left Hallway is a locked door, this door leads to this room. It contains the first of three teleporters. There is also two barricades and a radio in here. Also, across the teleporter, there are two blood splatters, one big, one small. If the player(s) look closely, they can see arms, 2 heads, and for the small blood splatter, a face. This is most likely the room where Dr. Maxis and his daughter met their death by Samantha's dog (which is now a Hellhound).

After opening either box barricade in either hallway, the player appears on a balcony and a section just outside the factory. If the player jumps off the roof, they will come across the mystery box, sitting next to the power generator. There are doors leading to Teleporter Room C and Teleporter Room B. When the power is turned on, a bridge folds down connecting the two balconies and the room connects with the left and right factory rooms. There are many barricades in this area.

After opening the door in the Mystery Box spawn room, it leads to a building in the factory. Inside the building, the final Teleporter lies. There is also a set of stairs where a barricade is blocking Zombies approaching from a cave. There is a balcony outside and is used to fire down on Zombies approaching the building. The balcony is also a good spot to hold out at, as all zombies can come in from one direction and the height offers the players a good view on how many zombies are moving in.

Radio - two of them are in here, one on a shelf in front of the staircase and another one above the hole into the underground alleyway by the Quick Revive Machine, but is accessible from the back of the underground alleyway

To find the musical easter egg the player needs to press the action button on the 3 green glowing jars that appear to have spines in them. 2 of the jars are in the animal testing lab, and the third one is near Teleporter B, in a side room. The song is Beauty of Annihilation. There is no specific order in which these need to be done. If done in iOS, you need to knife each of them in sucession, the same sound is heard as though hitting the use button on them in the console versions.

Near teleporter B going onto the balcony, in the destroyed building across the street; legs of a hanging person can be seen (similar to hanging people on previous two maps). If shot, feathers seem to come out.

There is a readable message inside an air conditioning unit on the lower side of the bridge that lowers with the power. It is viewable by looking through a break in the unit with a PTRS-41's scope. It reads: "In the event of any critical failure, the player is instructed to take his cyanide tablet that's included in his field operations kit. In the event that the player has misplaced his, there are several methods that will accomplish the same task. For example, the best..." (end of page.)

Another book can be seen outside of the map. It appears to have the page prior to this page. It reads: "It is the responsibility of absolute secrecy. No one is to know what you do, where you work, our research has uncovered, or what our purpose will be. You will have no further contact with your governments, or with your families. Your decision to fully dedicate your lives to Group 935 is absolute. Attached is your field operations manual which will direct you should our mission get compromised. We cannot afford to let this power fall into the wrong hands, and therefore the field operations manual should be considered your bible. Make your preparations. A new dawn is beginning for mankind. Dr. L. Maxis"

In addition to this message, there are several messages written on the walls that can be clearly seen.

In the alleyway on the right (facing away from the Pack-a-Punch machine) there is a distinct shadow of an upright teddy bear on the wall.

In the starting area if looking down, one of the drains to the left of the stairs, a note with random symbols on it can be found. Those symbols say "Edward it's time to kill Maxis".

Throwing a Monkey Bomb into the furnace will make it scream. After it explodes, Samantha says "Why are you so cruel to Mr. Monkey? Mr. Monkey just wanted to PLAY!"

Opening the door to the right from where the player spawns, by the Double-Barreled Shotgun, looking down, the player should see some wood panels. A few panels will be broken and inside there is a note. (Best read when playing solo mission, and leave a crawler.) The message reads: "...is produced by bombarding an Americium-243 nucleus with a Calcium 48 nucleus. It then decays (writing is blurred)... after further decay a meta-stable isotope is formed. This leads us to believe that transference of matter is indeed possible, and even the re-animation of b... (faded, but it is presumed to be beings)" Element 115, Ununpentium, is made by combining Americium and Calcium together, then letting it decay.

Written near the doors leading to the teleporters on the walls is a message reading "Return Through Aether". "Aether" is Greek for "heaven". Alternately, Aether is also often associated with light. This may be referencing the light a player is bathed in when entering the teleporter.

The room with the Quick Revive has a sign at the entrance that says "L. Maxis, MD Office" showing that that room was Dr. Maxis' office and he was the head scientist.

On the roofs of some buildings, the words "help" and "SOS" are visible. They seem to be formed from sand bags and planks.

If a player goes up to a perk machine and goes prone in front if it they will receive a free 25 points, possible from change underneath the machine, this can only be done once per player, per machine.

In the underground tunnel near Teleporter Z-C, there is a gold plaque behind the staircase reading "Ludvig Maxis."

In the Thompson Room, there is a brick that will sink into the ground and revealing a note if pressed and holding the use button while looking at it. (It's a small, differently colored brick at the end of the big pile of rubble underneath the Thompson).

In the Z-C teleporter room under the platform of the teleporter there is a broken piece of wood which reads ENG. Near teleporter Z-B there is a similar sign reading GER. Lastly there is another sign by teleporter Z-A reading FRA. It may be that these stand for England, Germany and France. This perhaps indicates where each teleporter was intended to transport the user to, if not to the mainframe this explains how the group arrived at Kino der Toten.

In the Z-B teleporter room there is a torn note which translates "The bees disappeared from Ludvig's village." This is interesting, as the bees must be a reference to the zombies, as both travel in large groups. Ludvig's village is obviously Der Riese, because Ludvig is Dr. Ludvig Maxis, and Der Riese was his operation. This means that the zombies disappeared from Der Riese, and went out into the world causing havoc. This explains how the zombies got away from Der Riese, their place of origin, and ended up in places such as Wittenau Sanatorium (Verruckt) and Shi No Numa.

At the Juggernog machine, there is a sign that reads: "Unsupervised Children will be instantly sold to the circus!". This sign is also found in Verruckt.

At the Mystery Box location near the Trench Gun there is a sign which has 3 bullet points. The first one reads "Did not resist in Paris". It is unknown what the other two say. This may be connected with the Paris photo noted below.

At the Trench Gun Mystery Box spawn, behind the mystery box is a board, with lots of torn notes and pictures. There is a picture of a Zombie in front of the Eiffel Tower in France. There is also a picture of a Hellhound. Another picture shows a horde of zombies, presumably escaping from Der Riese.

All the chalkboards have the words "Experiment 935 was a success" written in English. It also reads things such as "HYENA, Edward I know it was you, why won't it work any more."

In the Z-C teleporter room there is a board with "die glocke ist jetzt Malaile" (translation: the bell is now mobile.) pinned on the upper left, and "folgen Sie dem Gesamtplan" (translation:follow the entire plan) pinned on the bottom right.

In the Trench Gun hallway, there is a door with a danger sign and a Hellhound's head on it. There is also a lot of blood on the floor here, and as such this is thought to be the room where Dr. Maxis and his daughter Samantha were killed by the first Hellhound; previously Samantha's pet dog Fluffy.

One of Richtofen's quotes; "fluffy?, is that you?", is a reference to fluffy, Dr maxis's dog.

At the bottom of the cave in the starting area there are codes that read 'living dead'.

There are also several locations of books around the map (the field manual).

The Zombies sometimes will say "Sam" when they attack.

Codes Illuminati The Illuminati Codes are codes can be found in various areas in Der Riese, all written on wooden boards. There are 4 Illuminati Codes.